[RFE] Add string/pattern checks to LBaaSv2 HTTP/HTTPS health monitors

[Kobi Samoray]

Load balancer health monitors are usually capable of looking up a string or pattern in the HTTP/HTTPS reply, and pass the check only upon existence of it.
LBaaSv2 health monitor can only validate the HTTP/HTTPS return code, but cannot configure string lookup in the server response.

Currently, a health monitor an be configured to look for a 200 from "GET /", as an indicator that the backend member is working.

This bug adds the use case of checking for 200 + some string in the response. E.g. looking for 200 and "happy birthday", to avoid the case where a page decides to return a 200 but really contains an error string. Yes, loadbalancers have to work around lousy websites *all the time*.

[Brandon Logan (brandon-logan)]

this is something others will want (us at rackspace too). rfe!

[Henry Gessau (gessau)]

The title reads like a bug report, and the description adds very little detail. Can you word the title to describe what feature or enhancement you want? And perhaps add a little extra to the description, like a use-case.

[Armando Migliaccio (armando-migliaccio)]

Can we get response on comment #2 before going ahead? I am personally unclear on the impact of this request.

[Doug Wiegley (dougwig)]

Henry, does that answer your question?

[Henry Gessau (gessau)]

Thanks Doug, LGTM.

[Armando Migliaccio (armando-migliaccio)]

If Kobi has the code lined up and Doug is happy to support this, so am I, because this sounds reasonable enough. Mind you to preserve the old way for the health monitor to work.

[Armando Migliaccio (armando-migliaccio)]

I expect both the cli and the api to change in order to accommodate for the specification of the string to be checked, correct?

[Armando Migliaccio (armando-migliaccio)]

@Doug: what is your recommendation for feature submission? Spec or no spec?

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/258560

[Armando Migliaccio (armando-migliaccio)]

Patches look abandoned:

https://review.openstack.org/#/q/owner:%22Kobi+Samoray%22+status:open

[Launchpad Janitor (janitor)]

[Expired for neutron because there has been no activity for 60 days.]

[OpenStack Infra (hudson-openstack)]

Change abandoned by Armando Migliaccio (<email address hidden>) on branch: master
Review: https://review.openstack.org/258560
Reason: This review is > 4 weeks without comment, and failed Jenkins the last time it was checked. We are abandoning this for now. Feel free to reactivate the review by pressing the restore button and leaving a 'recheck' comment to get fresh test results.

[Armando Migliaccio (armando-migliaccio)]

Perhaps the time for this has passed.

[Launchpad Janitor (janitor)]

[Expired for neutron because there has been no activity for 60 days.]